session 5.3 dot corrective maintenance [email protected] synopsis: last year the...
TRANSCRIPT
Douglas F. Rose, P.E. NYSDOT, Region 1 Bridge Maintenance
328 State Street Schenectady, NY 12305 Phone: (518) 388-0397
[email protected] Synopsis:
Last year the NYS Department of Transportation started two maintenance initiatives called ‘Vertical Down” and “Joint”. Both target deficient elements on “good” bridges. The Vertical Down initiative focuses on improving the substructure condition of bridges that are otherwise in good condition. The Joint initiative aims at preventing contamination of the substructure elements by ensuring a watertight seal at the joint. Both initiatives are performance based and can be tracked using biennial inspection data. This presentation will cover the details of these two initiatives as well as Region One’s Bridge Maintenance’s efforts on a structure which met the criteria for both of them. Repairs were made to the concrete substructures using a “Dry-Pak-It” concrete repair system. This was the first repair done using this system in Region One. It is a pneumatic system that employs a unique concept of applying material and water to the repair simultaneously but separately through fixed nozzles. The joints were replaced with XJS armorless joints.
About the Presenter:
Doug Rose has been with DOT since 1985 and is currently the Regional Bridge Maintenance Engineer for Region One in Schenectady. He is responsible for the Bridge Maintenance Program for the 835 DOT maintained bridges in Region One. DOT bridge maintenance work is performed by 6 crews located in 5 facilities across the Region. Prior to coming to Maintenance, Doug was a Regional Structures Engineer and Bridge Management Engineer in two DOT Regions. He has a Bachelor’s Degree in Civil Engineering from Worcester Polytechnic Institute.
SESSION 5.3
DOT Corrective Maintenance Initiatives
Maintenance First Initiatives Maintenance First Initiatives at Region Oneat Region One
Douglas F. Rose, P.E.Douglas F. Rose, P.E.Regional Bridge Maintenance EngineerRegional Bridge Maintenance EngineerNYSDOT NYSDOT -- Region OneRegion OneEE--mail: mail: [email protected]@dot.state.ny.us
Maintenance and Operations FirstMaintenance and Operations First
“…“…provides a focus on maintenance and provides a focus on maintenance and operations with an emphasis on systems operations with an emphasis on systems management, operations management, management, operations management, response management, preventive response management, preventive maintenance and design modification maintenance and design modification (corrective) maintenance.(corrective) maintenance.””
Which means?Which means?
““Try to keep our good stuff goodTry to keep our good stuff good””
Bridge Corrective Maintenance Bridge Corrective Maintenance ActivitiesActivities
5 to 7 Repairs5 to 7 RepairsVertical DownVertical DownJointsJoints
““55--77”” RepairsRepairs
Objective: Repair the deficient element Objective: Repair the deficient element and thus extend the nonand thus extend the non--deficient life of deficient life of the bridgethe bridge
Criteria: Condition Rating > 4.8 with Criteria: Condition Rating > 4.8 with individual elements < 5.individual elements < 5.
Vertical DownVertical Down
Objective: Repair deficiencies in Objective: Repair deficiencies in substructures (i.e. bearings, pedestals, substructures (i.e. bearings, pedestals, bridge seat/cap beam, columns/stems) bridge seat/cap beam, columns/stems) where needed.where needed.
CriteriaCriteria–– Condition Rating > 4.8 and < 6.0Condition Rating > 4.8 and < 6.0–– Substructure Condition Index < 5.0Substructure Condition Index < 5.0
JointsJoints
Objective: Repair deficient joints to Objective: Repair deficient joints to prevent water and chlorides from falling prevent water and chlorides from falling onto substructure elements.onto substructure elements.
CriteriaCriteria–– Condition Rating > 4.8 and < 6.0Condition Rating > 4.8 and < 6.0–– Joint Rating < 5.0Joint Rating < 5.0
Some numbersSome numbers
Vertical Down CandidatesVertical Down Candidates–– State Bridges State Bridges –– 329 329 –– NonNon--State State –– 808808
Joint CandidatesJoint Candidates–– State Bridges State Bridges –– 10711071–– NonNon--State State -- 336336
Route 23 over Route 9WRoute 23 over Route 9WBIN 1007501BIN 1007501
Town of Catskill, Greene CountyTown of Catskill, Greene County
Built 1968Built 1968
3 Span Steel Multi3 Span Steel Multi--girdergirder–– 244244'' span (64span (64--9494--78)78)–– 3030'' Curb to curbCurb to curb
Route 23 over Route 9WRoute 23 over Route 9W
Route 23 over Route 9WRoute 23 over Route 9W
Route 23 over Route 9WRoute 23 over Route 9W
Condition Rating = 5.904Condition Rating = 5.904Substructure Condition IndexSubstructure Condition Index–– 6.0 6.0 –– 4.44.4 –– 4.9 4.9 –– 5.95.9Joint RatingsJoint Ratings–– 44 –– 4 4 –– 44 –– 44Meets Criteria for Vertical Down at Piers Meets Criteria for Vertical Down at Piers and all Jointsand all Joints
Joint at Pier 2Joint at Pier 2
Joint at Beginning AbutmentJoint at Beginning Abutment
Joint Header Failure at PierJoint Header Failure at Pier
Pier 2 Cap BeamPier 2 Cap Beam
Typical Pedestal ConditionTypical Pedestal Condition
Bearings and Pedestal on Pier 2Bearings and Pedestal on Pier 2
Joint RepairJoint Repair
Remove existing armored jointsRemove existing armored joints
Replace with Replace with ““Maintenance FriendlyMaintenance Friendly”” armorlessarmorlessjointsjoints
Used SSI XJS Joint System from C. S. Used SSI XJS Joint System from C. S. BehlerBehler–– SilSil--spec spec ElastomericElastomeric ConcreteConcrete–– DOW 902 Silicone SealDOW 902 Silicone Seal
Removal of old jointRemoval of old joint
SilSil--Spec InstallationSpec Installation
Finished JointsFinished Joints
Substructure RepairSubstructure Repair
Remove deteriorated concreteRemove deteriorated concrete
Replace using DryReplace using Dry--PakPak--It systemIt system
ReRe--habhab bearingsbearings–– Jack, disassemble, sandblast, paint and Jack, disassemble, sandblast, paint and
grease grease
You said, You said, ““Fix the substructures Fix the substructures with what?with what?””
DryDry--PakPak--It It SystemSystem
DryDry--PakPak--It at nozzleIt at nozzle
DryDry--PakPak--It featuresIt features
Non Shrink results are achieved by Zero Non Shrink results are achieved by Zero Slump and applying water for hydration in Slump and applying water for hydration in a unique manner that combines water and a unique manner that combines water and the cement mixture by capillary action. the cement mixture by capillary action.
Zero Slump allows continual application Zero Slump allows continual application regardless of repair depth. regardless of repair depth.
DryDry--PakPak--It featuresIt features
No sloughing or sagging. No sloughing or sagging.
Apply cement mixture, immediately trim to Apply cement mixture, immediately trim to original contour, float, and finish as original contour, float, and finish as required, all in one continuous operation. required, all in one continuous operation.
Zero SlumpZero Slump
Materials for DryMaterials for Dry--PakPak--ItIt
Portland Type I or II low alkali cementPortland Type I or II low alkali cement
Cement plaster or masonCement plaster or mason’’s sands sand
Fresh waterFresh water
Sand and Cement MixtureSand and Cement Mixture
Water tank with Ali/Cite additiveWater tank with Ali/Cite additive
Surface ConditionerSurface Conditioner
Surface ConditioningSurface Conditioning
Concrete RemovedConcrete Removed
Surface PreparationSurface Preparation
Gun in useGun in use
Applying to a ColumnApplying to a Column
Strike off excessStrike off excess
Hand float surfaceHand float surface
Finished ColumnFinished Column
Overhead ApplicationOverhead Application
SummarySummary
Maintenance isnMaintenance isn’’t just washing and paintingt just washing and painting
Try to get the most bang for the buck out of Try to get the most bang for the buck out of your maintenance dollarsyour maintenance dollars
DonDon’’t get caught in the trap of delaying t get caught in the trap of delaying corrective maintenancecorrective maintenance